John works as a Voice Technologies Administrator at company.com. His company wants a phone
system that can work with a single uninterrupted power supply (UPS) instead of placing a UPS at the
location of each IP phone. The company needs an uninterrupted and centralized power distribution
for the IP phones without using many cords. Which of the following methods will John use to provide
these facilities to his company?

A.
Supply power the IP phones through an Ethernet cable (PoE).

B.
Install an extension board to distribute power.

C.
Place the IP phones close to UPS.

D.
Install a UPS with extra ports for distribution.

Explanation:
A To accomplish the task, John has to supply power to the IP phones through an Ethernet cable. This
method is also called as PoE (Power over Ethernet). It also became a standard (802.3af) in 2003. PoE
(Power over Ethernet) is a method that is used to supply power to devices through an Ethernet
cable. It centralizes the distribution of power. It also allows users to use a single uninterrupted
power supply (UPS) instead of placing a UPS at the location of each device. Because of this, PoE
eliminates the problem of using many cords for power distribution.

C is incorrect. Placing the IP phones close to a UPS will not be the solution. This will be
inconvenient for the users.

D is incorrect. Installing a UPS with extra ports will not be the solution because it will not
reduce the usage of power cords.

B is incorrect. Installing an extension board will not be the solution because it will not
provide uninterrupted power supply.